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TIL the wheels of F1 cars are tethered so that in case of an accident they won't fall off and injure people

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X0vD6 TIL a teen got hyperacusis after an airhorn was blasted near her ear. Her type of hyperacusis makes her so sensitive to sound that it hurts and caused her to drop out of school because the voices of teachers were too painful. She also needs special noise cancelling headphones at the mall.
wLd1P TIL the phrase being on "cloud nine" actually comes from a cloud atlas published in 1896 that divides clouds into 10 basic types, the ninth type being cumulonimbus clouds, the most puffy-looking ones. See A Short History of Nearly Everything by Bill Bryson, Part V Chapter 17 Into the Troposphere.
VM6lm TIL Our galaxy resides near the centre of the KBC Supervoid, the largest known Void in the Observable Universe
OoVd1 TIL: Venus Flytraps are native to North and South Carolina
8yWK TIL two ISIS jihadists purchased “Islam for Dummies” and “The Koran for Dummies” before going to fight in Syria